MRI Registry EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST
VERSION
Which of the following implants may pose a problem during scanning?
a.implantable drug infusion pumps
b. cardiac pacemakers/breast tissue expanders
c. bone growth stimulators
d. all of the above - Answer- D
Which of the following could result from scanning a pt with a cardiac pacemaker?
a. changes of programming
b. induced current in the lead wire/pt burns
c. pacemaker may become dislodged and pulled from pt's chest - Answer- A and B
Which of the following procedures would be acceptable in checking for ferrous qualities
of accessory devices?
a. Check the weight
b. hand-held magnet
c. manufacturer label
d. take device into room - Answer- B
A ___ reaction to contrast involves respiratory, cardiovascular, cutaneous, and possibly
gastrointestinal manifestations? - Answer- Anaphylactoid
Which of the following factors are responsible for inducing a physiologic response to
induced voltage?
a. orientation of gradient field
b. pt's size
c. frequency of stimulus
d. all of the above - Answer- D
___ are reported visual sensations, or flashes of light, that result from direct excitation of
optic nerve, induced by the gradient magnetic fields. - Answer- Magnetophosphenes
At the present time, what is the FDA recommended safe SAR level to the head? -
Answer- 3W/kg
, Compared with conventional SE sequences, the fast pulse sequences, such as FSE or
TSE have ___ RF deposition. - Answer- Increased
Anesthesiologists consider the use of ___ to be a standard practice for monitoring when
scanning sedated or anesthetized pts. - Answer- Pulse Ox
After contrast injection, paramagnetic contrast agents affect pt tissue in which of the
following ways? - Answer- Decrease T1 and T2 relaxation times
Which of the following contrast agents is an ionic compound?
a. Mag
b. Prohance
c. Omniscan
d. None of the above - Answer- D
Following the injection of contrast, which of the following pts are most likely to have
serious reaction?
a. asthma/allergic respiratory disorders
b. High BUN levels
c. Anemic pts.
d. Claustrophobics - Answer- A
Which position best demonstrates the collateral ligaments of the knee? - Answer- COR
What is the major advantage of using a surface coil? - Answer- Increased SNR
The closer a receiver coil is to the pt, the less RF energy is needed to create trans mag.
- what is the result of this phenomenon? - Answer- Reduced SAR to pt
Which of the following coils is not transmit/receive?
a. head
b. body
c. TMJ
d. Extremity - Answer- C
Which coil provides the highest SNR when scanning a TMJ? - Answer- 3" circular coil
Which coils yields the high SNR of a sensitive, small surface coil, yet covers a large
area? - Answer- Phased Array
____ contrast enhancement occurs when the tissue of interest appears darker on
images following the administration of contrast. - Answer- Negative
If a tech wanted a higher res on a hip scan, which of the following would they select? -
Answer- 256x256
CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST
VERSION
Which of the following implants may pose a problem during scanning?
a.implantable drug infusion pumps
b. cardiac pacemakers/breast tissue expanders
c. bone growth stimulators
d. all of the above - Answer- D
Which of the following could result from scanning a pt with a cardiac pacemaker?
a. changes of programming
b. induced current in the lead wire/pt burns
c. pacemaker may become dislodged and pulled from pt's chest - Answer- A and B
Which of the following procedures would be acceptable in checking for ferrous qualities
of accessory devices?
a. Check the weight
b. hand-held magnet
c. manufacturer label
d. take device into room - Answer- B
A ___ reaction to contrast involves respiratory, cardiovascular, cutaneous, and possibly
gastrointestinal manifestations? - Answer- Anaphylactoid
Which of the following factors are responsible for inducing a physiologic response to
induced voltage?
a. orientation of gradient field
b. pt's size
c. frequency of stimulus
d. all of the above - Answer- D
___ are reported visual sensations, or flashes of light, that result from direct excitation of
optic nerve, induced by the gradient magnetic fields. - Answer- Magnetophosphenes
At the present time, what is the FDA recommended safe SAR level to the head? -
Answer- 3W/kg
, Compared with conventional SE sequences, the fast pulse sequences, such as FSE or
TSE have ___ RF deposition. - Answer- Increased
Anesthesiologists consider the use of ___ to be a standard practice for monitoring when
scanning sedated or anesthetized pts. - Answer- Pulse Ox
After contrast injection, paramagnetic contrast agents affect pt tissue in which of the
following ways? - Answer- Decrease T1 and T2 relaxation times
Which of the following contrast agents is an ionic compound?
a. Mag
b. Prohance
c. Omniscan
d. None of the above - Answer- D
Following the injection of contrast, which of the following pts are most likely to have
serious reaction?
a. asthma/allergic respiratory disorders
b. High BUN levels
c. Anemic pts.
d. Claustrophobics - Answer- A
Which position best demonstrates the collateral ligaments of the knee? - Answer- COR
What is the major advantage of using a surface coil? - Answer- Increased SNR
The closer a receiver coil is to the pt, the less RF energy is needed to create trans mag.
- what is the result of this phenomenon? - Answer- Reduced SAR to pt
Which of the following coils is not transmit/receive?
a. head
b. body
c. TMJ
d. Extremity - Answer- C
Which coil provides the highest SNR when scanning a TMJ? - Answer- 3" circular coil
Which coils yields the high SNR of a sensitive, small surface coil, yet covers a large
area? - Answer- Phased Array
____ contrast enhancement occurs when the tissue of interest appears darker on
images following the administration of contrast. - Answer- Negative
If a tech wanted a higher res on a hip scan, which of the following would they select? -
Answer- 256x256
